.\" Copyright (c) 1989, 1990, 1993
.\"	The Regents of the University of California.  All rights reserved.
.\" Chinese version Copyright (c) 苏勇  ysu@gnocis.org
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Kim Letkeman.
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.\"     @(#)cal.1	8.1 (Berkeley) 6/6/93
.\"
.TH CAL 1 "June 6, 1993"
.SH NAME
cal, ncal \- 显示一个日历
.SH 总览
.B cal 
[
.B -mjy
] 
[
.IR 月份
] 
[
.IR 年份
] 
.SH 描述
显示一个简单的日历.. 
如果没有指定参数, 则显示当前月份.
选项如下所列: 
.IP -m
显示星期一作为一周的第一天..
(缺省为星期日.)
.IP -j
显示儒略历的(Julian)日期 (以 1 为基的天数, 从 1 月 1 日开始计数) .
.IP -y
显示当前年份的日历.. 
.PP
一个单一的参数指定要显示的年份 (1 \- 9999) ;
注意年份必须被完全地指定: 
.B cal 89
.IR 不会
显示1989年的日历. 
两个参数表示月份 (1 \- 12) 和年份. 
如果没有指定参数, 则显示当前月份的日历. 
.PP
一年从Jan 1 (1 月 1 日) 开始.
.PP
格里高利历法改革(Gregorian Reformation)被认为发生于 1752 年 9 月 3 日.
在此之前, 多数国家已经认可这项改革(尽管有一些直到 20 世纪初才认可它).
那天之后的 10 天在这项改革被略去了, 所以那个月的日历有点不太寻常. 
.SH 参见
.BR calendar (3),
.BR strftime (3)
.SH 历史
一个
命令出现于第6版 AT&T UNIX. 
.SH "[中文版维护人]"
.B 苏勇 <ysu@gnocis.org>
.SH "[中文版最新更新]"
.B 2001/07/15
.SH "《中国linux论坛man手册页翻译计划》:"
.BI http://cmpp.linuxforum.net
